Drone Catches Drone! In Japan

The Tokyo police have launched their new anti-drone squad. This group is charged with apprehending offensive law-breaking drones. In flight.

(Drone vs. Anti-Drone! Video from Japan.)

I think I've seen this future before. In his 1995 novel The Diamond Age, science fiction author Neal Stephenson wrote about a similar swarm of devices tasked with surveillance and security - the dog pod grid:

Atlantis/Shanghai occupied the loftiest ninety percent of New Chusan's land area - an inner plateau about a mile above sea level, where the air was cooler and cleaner. Parts of it were marked off with a lovely wrought-iron fence, but the real border was defended by something called the dog pod grid - a swarm of quasi-independent aerostats...
(Read more about Stephenson's dog pod grid)